My guess is 'for understanding those at the bootom of the tree'. Many moons ago, I worked in the hotel and catering trade, as did my wife, so we understood how badly paid those folk are - and not much has changed.
We all know that corporates make much of their money by overcharging at the stop but then, they also make money by underpaying at the bottom. All the problems that package delivery people have tell us how badly paid they are. In the UK we have medical support staff with 30 years experience being paid only a little over the minimum wage. Just how well do mega corporations pay to the outsourced taxi operation and how much do they pay to the actual driver?